package jdbc;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Scanner;

/**
 * 完成用户登录功能
 * 要求用户输入用户名和密码
 * 如果与user表中该用户信息输入一致则提示登陆成功，否则登录失败
 */
public class LoginDemo {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入用户名");
        String username = sc.nextLine();
        System.out.println("请输入密码:");
        String password = sc.nextLine();
        try (Connection connection = DBUtil.getConnection();){
            Statement statement = connection.createStatement();
                String sql = "SELECT  u.username,u.password " +
                        "FROM user u " +
                        "WHERE username = '"+username+"' " +
                        "AND password = '"+password+"' ";
                ResultSet rs = statement.executeQuery(sql);
            if(rs.next()){
                System.out.println("登录成功");
            }else{
                System.out.println("登录失败");

            }

        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}
